As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LT MAIN DECK CARGO SMOKE DETECT WARNING ON. VISUAL INSPECTED MAIN CARGO DECK AND NOTICED PRESENCE OF FUMES NEAR 14R PALLET POSITION. DECLARED EMERGENCY AND DIVERTED TO COLD BAY (CDB) EMERGENCY CHECK LIST PERFORMED IAW AOM. INSPECTED AREA AROUND SUSPECTED FUMES FOR DAMAGE OR REMAINING FUMES. NO DEFECTS NOTED. SUSPECT SMOKE DETECTOR 4B ERRONEOUS. DEFERRED 4B SMOKE DETECTOR PER MEL.